A THROUGH BIT DIPOLE ACOUSTIC LOGGING TRANSMITTER AND A LOGGING DEVICE

• Main Authors: WEI, Qian, LIU, Bin, CONG, Jiansheng, CHE, Chengxuan, WANG, Xiuming
• Format: Patent
• Language: English
• Published: 28.11.2019
• Subjects: DETECTING MASSES OR OBJECTS; EARTH DRILLING; EARTH DRILLING, e.g. DEEP DRILLING; ELECTRICITY; FIXED CONSTRUCTIONS; FOR PERFORMING MECHANICAL WORK IN GENERAL; GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL; GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; MEASURING; METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICALVIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY; MINING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS; PERFORMING OPERATIONS; PHYSICS; TESTING; TRANSPORTING

The invention relates to a transmitter of a through bit dipole acoustic logging device and the logging device, and the transmitter includes a substrate and 2 piezoelectric ceramic plates respectively at either sides of the substrate; wherein the piezoelectric ceramic plate is composed of at least one block of piezoelectric ceramic units; wherein the lengthwise direction of the piezoelectric ceramic elements is along the width direction of the piezoelectric ceramic plates, the width direction of the piezoelectric ceramic units is along the thickness direction of the piezoelectric ceramic plates, and the thickness direction of the piezoelectric ceramic units is along the lengthwise direction of the piezoelectric ceramic plates; the polarization directions of the piezoelectric ceramic units are along the thickness direction of the piezoelectric ceramic units; when electric excitation is applied along the length of the piezoelectric ceramic plate, the piezoelectric ceramic plate on one side of the substrate is extended while the piezoelectric ceramic plate of the other side shortened, pushing the substrate to form a bending vibration, transmitting the thrust to the media and generating acoustic waves.